Year	% of total merchandise exports
1960	0.4339772426567875
1961	0.12148700089090467
1962	0.328313443155547
1963	0.2457256031334929
1964	0.16769916318117573
1965	0.18140084482170193
1966	0.058695090742610284
1967	0.38008546655288417
1968	0.5586433440258651
1969	0.7146854368068645
1970	0.4393584538909221
1971	0.39267244340777263
1972	0.2711380886715205
1973	0.2742259920316611
1974	0.22956879932445992
1975	0.2023017495562782
1976	0.21676915795948165
1977	0.20136307561239622
1978	0.3267283725241054
1979	0.7647597691192018
1980	1.0580482437072651
1981	1.0502037166808889
1982	0.892611400773041
1983	0.9507756164314594
1984	0.9835185455208522
1985	0.9534322951907456
1986	0.7497200371562707
1987	0.622489946510274
1988	0.5042077065366564
1989	0.5633352027665101
1990	0.6343155685971315
1991	0.6129120665856149
1992	0.6678491906202901
1993	0.9341456244678159
1994	1.0325312129872126
1995	1.0779440552595294
1996	1.00881500759461
1997	1.193918445518623
1998	1.4617527969325936
1999	1.3274919234072293
2000	1.5141704025972793
2001	1.62949425407424
2002	1.6114726755899176
2003	1.513264853898609
2004	1.7628639805818254
2005	1.7966032842582476
2006	2.209042324021026
2007	2.537959435339188
2008	2.9916633022329395
2009	2.7847760311200735
2010	3.403501524476333
2011	3.6936640347280654
2012	3.7783769675609618
2013	3.8014901554996325
2014	3.727945285166802
2015	3.782412875796923
2016	3.6640715849620635
2017	3.892999969370768
2018	3.9957512067370056
2019	4.102285946351201
2020	3.907886850788041